Simultaneous identification of microparticles material nature and size distribution using spectral resonances in MIR-ATR spectroscopy

Ahmed M. Othman; Yasser M. Sabry; Diaa Khalil; Tarik Bourouina

doi:10.1117/12.2649136

15 March 2023 Simultaneous identification of microparticles material nature and size distribution using spectral resonances in MIR-ATR spectroscopy

Ahmed M. Othman, Yasser M. Sabry, Diaa Khalil, Tarik Bourouina

Author Affiliations +

Proceedings Volume 12434, MOEMS and Miniaturized Systems XXII; 124340F (2023) https://doi.org/10.1117/12.2649136
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Analysis of microparticles in liquid samples is important in many settings, such as the analysis of bacteria in biofluids, or microplastics in water. In addition to their specific absorbance peaks, microparticles result in ripples in the ATR spectra measured especially in the shorter wavelength range due to resonance effects. By analyzing these ripples, in addition to the absorbance peaks, the microparticles material and size distribution can be simultaneously identified. We develop a method to extract the size distribution of particles of diameter 6 μm and 10 μm. In addition, we apply the model to ATR spectroscopic measurements of poly(methyl methacrylate) microspheres of different diameters in water to extract their size.

Conference Presentation

Citation Download Citation

Ahmed M. Othman, Yasser M. Sabry, Diaa Khalil, and Tarik Bourouina "Simultaneous identification of microparticles material nature and size distribution using spectral resonances in MIR-ATR spectroscopy", Proc. SPIE 12434, MOEMS and Miniaturized Systems XXII, 124340F (15 March 2023); https://doi.org/10.1117/12.2649136

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